Improvement in bolt-machines



e @that MOORE HARDAWAY, OF ST. LOUIS, MISSOURI.

Lette/rs Patent No. 88,783, dated April 13, 1869.

IMPROVEMENT IN BOLTfMACHINS.

The Schedule referred to in these Letters Patent and making Patil of thename.

To all whom 'it ma/y concern:

Be it. known that I', MOORE HARDAWAY, of St. Louis, in the county of St.Louis, and State of Missouri, have invented certain new and usefulImprovements in Machines forMaking Bolts and Rivets; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, and of their mode or manner of operation, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, and making a part of this specification.

My present invention is an improvement upon that for which LettersPatent of the United States were granted to me on the 11th day ofOctober, 1864, and consists in certain improvements in the constructionand operation of the die-bok and dies for forming the head of the boltor rivet, by means of which the formed bolt is more quickly andabsolutely released from such dies, and any possible injury or strain tothe parts is more certainly prevented. j

Figure 1 is a general perspective view of the machine, its several partsin the position they have when the bolt is completed, a portion of thejaws that hold the bolt being broken away to better show the die.

Figure 2 is a like view of the machine, when the die'aud die-box aredrawn b ack, and the jaws that hold the bolt are opened, and the boltdischarged.

The construction and operation of the clamps or jaws d al', which seizeand hold the iron rod while the head of the bolt or rivet is beingformed, and the forward and backward movement of the die-box I) and diec, and of the plunger or header lt, are substantially the same asdescribed in my former patent.

In the machine as patented to me in 1864, the diebox b was solid, orsubstantially the same as a single piece of metal, and carried in asuitable recess, made in its end, the die c, which was also solid, ormade of a. single piece of metal.

In suchmachine, the plunger, or header k, when forced against the endofthe blank bolt, upsets such blank, and forms the head thereon, whichis made to ll and take the configuration of the die c.

The head of the bolt thus closely filling the die c, when the die anddie-box are drawn back, it necessarily requires some considerable forceto disengage or draw the die from off the bolt-head the die is thusliable to become more or less injured, and the several parts to be, insome degree at least, strained.

To cause the bolt-head to be at once and wholly released from the die c,and at the beginning of its backward movement, and thus overcome orremove all danger or liability of strain and injury to the parts, in

disengaging the bolt from the dies, I make the diebox b in two parts, 12, one part, 1, of such box being connected with the lever f, which isactuated by the cam h., and by which the die-box is moved forward at theproper time, and the other part, 2, of such box connecting with theformer by a pivot, or its equivalent,

on which, as a centre, such part can have a little lateral movement, sothat the two parts, 1 2, can approach to and recede from each other.

On the side of such part 2 of the die-box is fixed a projection, p,having an inclined outer surface, which, as the die-box is carriedforward in the direction of the arrow, by the action of the cam h,-strikes against the inner surface, also inclined, of the standard r,such inclined surface being indicated by the dotted line, and forces thetwo parts of the die-box toward each other, as such box is furtheradvanced.

The die c, which is within the die-box, and by which the head of thebolt is formed, is also made in two parts, 3.4, instead of being madesolid, as in the former machine, one part, 3, of such die being attachedto and moving with the part 1 of the die-boX, and the other part, 4, ofsuch die-box being attached to and moving with the other part 2 of thedie-box.

lhe inner faces or surfaces of the two parts 3 4, of

' the die c, are planed and smoothed, so that when the two parts of thedie are brought together by the movement of the die-box, they will tclosely, and will make a tight joint", leaving no space between them,and the -inclined surfaces p and r, on the die-box and on the standardr, are so arranged that when the diebox b,

with its enclosed die, is carried forward, up to and against the clampsor jaws d d', the two parts 3 4, of the die c, will be forced tightlyagainst each other, thus forming, in fact, a solid die.

As the two parts of the die-box are thus moved toward each other, andthe opposite parts of the die are brought in close contact, the plungeror header k, is forced forward, upsetting the end of the forming thehead on the bolt in the die c.

The head having been formed on the blank, the diebox and its encloseddie, are given a backward motion,

and at the very beginning of such movement, the opposite parts of thedie-box b and die c open or spread from each other, and thus at oncerelease the head 'of the bolt from the die, so that the backwardmovement of the die, and its enclosing-box, is wholly free from anyresistance whatever, and no more power is required to carry it back,except to move its own weight,

and hence, all strain, or possible injury of the parts is entirelyavoided.

Such construction of the die-box and die, in two parts, not onlysimplifies the action of the machine, but also much reduces the cost ofconstructing the dies required in its operation.

What I claim as my invention in machines for making bolts, 85o., anddesire to secure by Letters Pat ent, is-

The combination of the divided die c, divided diebox b, inclinedsurfaces p fr, and header k, arranged and operating substantially asdescribed, with the clamp dies d al', for the purposes set forth.'

MOORE HARDAWAY.

Witnesses:

S. D. LAW, FRED B. SEARS.

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